Maurice Chevalier famously sang, “I’m so glad I’m not young anymore.” He was referring to one kind of heart trouble: amours.

But if you are 62 and have another kind of heart problem from birth — say, a “heart murmur” (as a mitral valve prolapse is often called) — young is not better in America. Being older than 65 brings Medicare coverage.

In fact, you might be consumed with worry at 26 (the reverse of 62) if you have a murmur — facing a lifelong pre-existing condition and about to lose coverage under your parents’ health care policy. That off-switch might change your career choice.